And yes, that's a typo, said Royce consultant Dave Gilliard. The redrawn 40th is in Los Angeles County, represented by Rep. Lucille Roybal-Allard, D-Los Angeles, and has a 47-percentage point Democratic registration advantage that would withstand even the tallest of Republican waves in 2014.

"He's running in the 39th," Gilliard said. The campaign corrected its filing Friday.

The 39th covers parts of Orange, Los Angeles and San Bernardino counties. Royce won re-election there last year with 57.8 percent of the vote against Democrat Jay Chen.

It's not like 39 was a completely new district number for Royce. He represented another version of the 39th Congressional District in the 1990s.

Editor's Note: This post was been updated at 3:50 p.m. on Dec. 27, 2013 to note that the paperwork was amended on Friday.

PHOTO: Rep. Ed Royce, R-Fullerton, in his official congressional photo.